(19)

(11)

EP 1 664 441 A1

(12)

(43) Date of publication: 07.06.2006 Bulletin 2006/23 (21) Application number: 04769187.8 (22) Date of filing: 25.08.2004

(51) International Patent Classification (IPC):  E01F 15/04(1995.01) (86) International application number: PCT/IB2004/002768 (87) International publication number: WO 2005/021873 (10.03.2005 Gazette 2005/10)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 02.09.2003 IT MI20031691 (71) Applicant: PROVINCIA AUTONOMA DI TRENTO 38100 Trento (IT)	(72) Inventors: DEMOZZI, Andrea I-38100 Trento (IT) ECCEL, Massimo I-38014 Gardolo (IT) GIAVOTTO, Vittorio I-20133 Milano (IT) (74) Representative: Petruzziello, Aldo et al Racheli & C. S.p.A. Viale San Michele del Carso, 4 20144 Milano 20144 Milano (IT)